Table 2.

Labor and Delivery Drugs and Birth Complications Have a Synergistic Effect on Increasing the Likelihood of a Child Being Diagnosed With ASD.

	CMH statistic value	CMH p value	CMH pooled OR value	Tarone test p value
L&D drugs and birth complications vs. ASD	12.97	3.16 × 10−4	2.311	.97
Pitocin and birth complications vs. ASD	19.26	1.14 × 10−5	2.486	.75

CMH test and Tarone test results indicate that a combination of these factors can lead to higher rates of ASD than each factor independently. CMH = Cochran–Mantel–Haenszel; L&D = labor and delivery; ASD = autism spectrum disorder.